Garland Canal by Capt. Dastur (1977)

Captain Dinshaw J. Dastur, an engineer who was also a trained pilot. His plans were impressive enough that friends, notably Homi Bhabha, got him an introduction to Jawaharlal Nehru. His  Proposal (1977) envisaged construction of two canals – the first 4200 km. Himalayan Canal at the foot of Himalayan slopes running from the Ravi in the West to the Brahmaputra and beyond in the east; and the second 9300 km Garland Canal covering the central and southern parts, with both the canals integrated with numerous lakes and interconnected with pipelines at two points, Delhi and Patna.The Himalayan Canal will be 2,600 miles long. It will conserve about 250 million acres feet of water out of the total Himalayan flow of 500 million acre feet and will distribute the rest. It will have nearly 30 integrated lakes sandwiched between the periphery of the Himalayan Range and a 100 feet rear bund of the canal. Each lake is on an average 120 feet deep, about 1.25 miles broad and each is segregated at 33.113 miles distance by a bund with gates. The canal is in front of the continuous integrated lakes ‘and is 1,000 feet broad and 50 feet deep which is formed by the front bund of the canal. The canal has got flood gates which opens up to the subsidiary canals which are positioned at every two miles distance on the main canal and forms part of the herringbone system of drainage and irrigation. The permanent level of water in the canal which is filled by the lakes behind is 30 feet high.The Central and Southern Garland Canal starts from the centre of the North Part of the Central Plateau skirting both [sides of the Central Plateau, the Deccan Plateau and the Southern Plateau, joining at a point somewhere near Cape Comorin forming a complete garland, that is why it is known as the Central and Southern Garland Canal. It has got 200 integrated lakes similarly built as in the Himalayan Canal and two very big lakes, one in Nagore in Rajasthan and the other one in the Valley of Son. The conserving capacity of this canal with its integrated lake is in the vicinity of about 750 million acre feet of water. It is 5,800 miles long and it is built at an even height of about 1,000 feet above MSL. The two canals are joined at two points by pipe lines and also by an old course of river which flows into the Rajputana desert which is treated by raising bunds on both the sides, joining the Himalayan Canal to the Central and Southern Garland Canal. In this way we can bring huge quantities of water into the Central and Southern Garland Canal from the Himalayas. –

The transfer and distribution of water in the Garland Canal Scheme takes place purely by gravity and no energy is needed whatsoever. There are three points shown on the map in the Jamuna basin from where the surplus water can be also re-cycled into the Central and Southern Garland Canal is required by means of unlimited hydro-electric power we will be having at our disposal once the garland canal project is constructed thus retarding the progress of the water flowing into the sea and dissipating itself.

In order to supply water to the plains under controlled conditions at every two miles interval on the main canal are positioned subsidiary canals. They form part of the system, known as the herringbone system of drainage and irrigation.

The cost estimated by Capt. Dastur was Rs. 24,095 crores.   The cost estimated by the experts in 1979 was about Rs. 12 million crores. The realistic cost at 2002 price level comes to about Rs. 70 million crores.